Gas Mileage
Thread Starter
Super Member
Joined: May 2018
Posts: 554
Likes: 63
From: Virginia
2019 E450 Cabriolet, 2020 GLS450
Gas Mileage
Let me start out by saying how much I love my 2019 E450 Cab! It was quite painful waiting for her, but I feel like I'm 16 years old and just got my Driver's License asking my parents every 30 minutes if I can drive somewhere to get them something. Short on butter? I'll go to the store!.... Pickup my sister that I'm always fighting with and can't stand? Absolutely! …. anything, ANYTHING to drive!
I am wondering about the gas mileage, though.... Sticker says 19 City, 26 highway (combined average 22). I'm getting like 13. I'm not revving her at all. It's difficult not throwing her into Sport+ mode and trying out that 0-60 in 5 seconds... BUT.... I'm strictly following the engine break-in.... So, smooth starts, etc.
I'm just surprised at the seemingly low gas mileage.
Anyone have an E400 with the Bi-Turbo that can comment on the mileage (or anyone for that matter)?
I am wondering about the gas mileage, though.... Sticker says 19 City, 26 highway (combined average 22). I'm getting like 13. I'm not revving her at all. It's difficult not throwing her into Sport+ mode and trying out that 0-60 in 5 seconds... BUT.... I'm strictly following the engine break-in.... So, smooth starts, etc.
I'm just surprised at the seemingly low gas mileage.
Anyone have an E400 with the Bi-Turbo that can comment on the mileage (or anyone for that matter)?
Super Member
Joined: Jul 2017
Posts: 541
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From: Houston Texas
2023 AMG GLE63s, 2017 AMG SL63, 2024 Sprinter, 1958 Chevrolet Corvette
Hey Sack - I've had my '18MY E400 for 9 months now ... and "MissE" gets about 24 in combo driving and 29 Hwy ... your 13 seems quite low even considering "break in". ?? What octane rating are you putting in and what percent ethanol ...
Thread Starter
Super Member
Joined: May 2018
Posts: 554
Likes: 63
From: Virginia
2019 E450 Cabriolet, 2020 GLS450
putting premium gas in. It’s brand-name has. I assume it’s the normal 10% ethanol
Super Member
Joined: Jul 2017
Posts: 541
Likes: 158
From: Houston Texas
2023 AMG GLE63s, 2017 AMG SL63, 2024 Sprinter, 1958 Chevrolet Corvette
Well, I failed to mention that mileage is exclusively in "C" mode and I run my tire pressure at the top end of the range ... good luck with your diagnosing ... hope others can chime in with ideas / thoughts
Thread Starter
Super Member
Joined: May 2018
Posts: 554
Likes: 63
From: Virginia
2019 E450 Cabriolet, 2020 GLS450
hmmmmm.....
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Joined: Apr 2007
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From: San Diego, CA
2024 EQE 500
I did see your are in Comfort mode, which is important. When in Sport mode, it prevents the transmission from shifting to 9th gear in my observation, which pretty dramatically affected my mileage. 13 is low, assuming break in. If the same at ~2500 miles, I'd reset the TCU and see what happens.
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Joined: Feb 2018
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E400 Coupe
Same here... I get 24mpg combined and 29/30 on hyw on my E400 Coupe. I mostly dive in "E mode", here in NC most of the hyws are a straight line and the mode where the car slides the road as if it was in neutral is great to increase that milage.
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Thread Starter
Super Member
Joined: May 2018
Posts: 554
Likes: 63
From: Virginia
2019 E450 Cabriolet, 2020 GLS450
It's getting better.... I think it was because for the first 10 days or so, it was nothing but stop - start- stop - start. Like kids to school, then grocery then whatever. I think it was just a bit much. When I started a little more "normally" it has increased to 18 in the city. I know it's a crime, but I really haven't had a chance to take her out on the highway for an extended run :-(
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